on naphthaline . 213 
cool ; during which time the residuum became fixed, and to 
the eye resembled pitch. 
The several products of the distillation above described 
being carefully separated from each other, the more re- 
markable of them were submitted to examination ; but as 
leisure was wanting for a full investigation of their charac- 
ters, the Society is requested to accept, with some indulgence, 
the following description of such of their properties as were 
ascertained. 
Properties of the aqueous product. 
Taste, saline and alkaline ; with an ammoniacal and 
slightly aromatic odour. 
Sp. gr. 1023. 
Became faintly blue by the addition of a solution of prus- 
siate of potash. 
Grs. 700 of this aqueous fluid were evaporated under an 
exhausted receiver inclosing a quantity of dry muriate of 
lime: the residuum of the 700 grains weighed not more 
than half a grain, and consisted partly of a brown oil and 
partly of a sparingly soluble saline matter, which by the 
proper tests was found to contain sulphuric acid and muriatic 
acid ; the former apparently in greater quantity than the 
latter. 
Properties of the oily fluid. 
Taste, pungent, bituminous, and aromatic ; with an odour 
similar to the taste, and slightly ammoniacal. 
Sp. gr. 0.9204. 
Boils at about 210 0 of Fahrenheit : remains perfectly fluid 
at 32 0 . 
Evaporated at a medium atmospheric temperature, it leaves 
